“We have provided the government with relevant information including facts in the chronology of events surrounding Mr. Ledger’s death,” Miller said in a statement Monday, “and the fact that Ms. Olsen does not know the source of the drugs Mr. Ledger consumed.”

The Associated Press has spoken to an official within the DEA who can confirm the reports that Mary-Kate’s lawyer is indeed angling for immunity and refusing to cooperate:

The official confirmed a report that Olsen wants a promise of immunity from prosecution before speaking to the Drug Enforcement Administration. Olsen was a close friend of Ledger’s, and was the first person called by a masseuse who found the 28-year-old “Dark Knight” actor’s lifeless body in his Manhattan apartment.
Authorities have obtained a subpoena that could force Olsen to appear before a grand jury if negotiations with her lawyer fail, the official said.

Okay, let’s cut to the chase: So, maybe Mary-Kate Olsen provided Heath Ledger with the drugs and left a note saying “Take 20 and call me in the morning.” That doesn’t mean she necessarily “killed” him, I think – maybe. Who knows? I’m not very good at this lawyer stuff. But, I do know a half vampire bat when I see one, and how do you convict a member of the animal kingdom? Answer: You don’t. That’s double jeopardy, my friends. I rest my case and object stuff.